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In nature, the food and feeding relationships of plants and animals are rarely as simple as the examples of food chains described above, because many animals eat more than one kind of food. On this account, different kinds of food chains overlap each other or intercross each other. The food chains do not operate in isolation. This network of food chains operating in nature in a particular area is called a food web. For example, grass is eaten by grasshoppers as well as by rabbits, deer or cattle, and each of these herbivores may be eaten by many carnivores, such as frog, snake, eagle or tigers depending upon their food habits.
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